In the effects.xml some of the effects call for textures with the .tga file tag. Other than the 2 .tga files in the flak folder, a search turns up nothing. I did notice that each .tga texture reference in the xml has a name identical to a .dds file except for the tag. If you rename a .dds texture and the corresponding .dds reference in the xml, do you also have to change the .tga reference name?